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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Summary of Amortized Cost of Loans and Leases on Nonaccrual Status (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	$ 25,129	$ 15,919
Nonaccrual loans with related allowance	9,937	10,730
Total nonaccrual loans	35,066	26,649
Commercial and industrial, including specialized lending
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	3,322	3,365
Nonaccrual loans with related allowance	286	1,071
Total nonaccrual loans	3,608	4,436
Multifamily
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	5,161	0
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	5,161	0
Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	8,920	5,869
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	8,920	5,869
Commercial real estate non-owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	62	0
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	62	0
Residential real estate
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	7,664	6,685
Nonaccrual loans with related allowance	425	117
Total nonaccrual loans	8,089	6,802
Manufactured housing
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	2,268	2,331
Total nonaccrual loans	2,268	2,331
Installment
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	6,958	7,211
Total nonaccrual loans	$ 6,958	$ 7,211

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- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
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-Publisher FASB
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